Self diagnosis
Display group overview
Display group 000 (decimal displayed value)
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▪ Engine running at idling speed, control unit in "basic setting"
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Display zones
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Specification
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Corresponds to
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Part load adaption value for Lambda control before catalyst
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118...138
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-7...7 %
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Idling adaption value for Lambda control before catalyst
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241...255 or
0...14
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-10...10 %
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Lambda control
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96...160
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-5...5 %
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Idling air mass adaption value
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112...144
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-5...5 kg/h
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Idling control (idling air mass)
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112...144
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-5...5 kg/h
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Throttle valve angle
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0...23
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0...10 <°
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Battery voltage
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176...212
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12.0...14.0 V
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Engine speed
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80...88
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800...880 rpm
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Engine load
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28...58
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1.4...2.4 ms
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Coolant temperature
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170...204
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80...108 °C
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‒ If one of the specifications are not attained,
, evaluating display group 000
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‒ Additional measures see Repair procedures:
Notes:
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◆ Press ⇒ button to end read measured value block.
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◆ After terminating read measured value block input 06 for "End output" function and confirm with Q.
Evaluating display group 000
Display zone: 1
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Possible fault cause
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Fault elimination
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More than 204
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Coolant temperature sender
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- Check coolant temperature sender => Page 24-92
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Less than 170
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Coolant temperature sender
Thermostat defective (open)
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- Check thermostat => Repair group 19
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Display zone: 2
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Possible fault cause
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Fault elimination
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More than 58
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Consumer switched on
Lambda control on limit
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- Switch off consumer
Check Lambda probe and Lambda control before catalyst => Page 24-59
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Less than 28
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Unmetered air
Fuel pressure regulator defective/hose fallen off
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- Check intake air system for leaks => Page 24-122
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Display zone: 3
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Possible fault cause
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Fault elimination
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Less than 80
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Driving range selected
Throttle valve control part defective
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- Selector lever in P or N position
Check throttle valve control part => Page 24-72
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More than 88
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Idling switch open
Throttle valve control part defective
Unmetered air
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- Check throttle valve control part => Page 24-126
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Display zone: 4
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Possible fault cause
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Fault elimination
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Less than 176
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Alternator defective
Battery discharged/defective
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- Check control unit voltage supply => Page 24-109
Check alternator
Check battery
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More than 212
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Voltage regulator defective
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- Check voltage regulator
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Display zone: 5
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Possible fault cause
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Fault elimination
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Less than 0
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Not possible
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---
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More than 23
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Basic setting of throttle valve control part has not been performed
Throttle valve control part defective
Throttle cable adjustment
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- Perform basic setting
=> Page 24-72
Adjust throttle cable => Repair group 20
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Display zone: 6 + 7
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Possible fault cause
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Fault elimination
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Less than 112
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Unmetered air after throttle valve
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- Check intake air system for leaks => Page 24-126
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More than 144
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Increased engine load
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- Switch off consumer
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Display zone: 8
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Possible fault cause
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Fault elimination
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Less than 96
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Engine too rich, Lambda control weakens mixture
Lambda control at limit
Lots of fuel from activated charcoal filter
Fuel pressure regulator defective/hose fallen off
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- Check Lambda probe and Lambda control before catalyst => Page 24-122
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More than 160
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Engine too lean, Lambda control riches mixture
Unmetered air
Injectors defective
Lambda control at limit
Secondary air system
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- Check Lambda probe and Lambda control before catalyst => Page 01-72
, final control diagnosis and=>Repair group 26
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128
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Shortage of fuel
Lambda control blocked
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- Check amount of fuel in tank
Check Lambda probe and Lambda control before catalyst => Page 24-27
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Display zone: 9
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Possible fault cause
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Fault elimination
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Less than 241 or
more than 14
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, evaluating display group 25
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Display zone: 10
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Possible fault cause
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Fault elimination
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Less than 118 or
more than 138
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, evaluating display group 25
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